Razor-stropping machine



S. KANNER.

RAZOR STRQPFING MACHINE.

APPLrcAlloN FILED AUG.18,1919.

4,434,439, .Patented NOV. 7, 1922.

2 SHEEIS-SHEE] 2.

SAMUEL HAMMER, OF NEW YORK, N. Y.

RAZOR-STRPPING MCHINE.

Application tiled August 18, 1919. Serial No. 318,354.

all w hom t 'ma/ 1] concern Be it known that I, SAMUEL KANNER, a citizenoi the United Sta es, and a resident ot New York city, in the county ofNew York and State of N ew York, have invented certain new and usefulimprovements in Razon Stropping ltlachines, ot which the iollowing is aspecilication.

The invention pertains to razor stropping machines ot the classcomprising a trame through which a strop is threaded and is to bealternately pulled at its ends, and a blade-holder located between thereaches oit the strop and adapted to alternately carry the blade theretoas said reaches are alternately pulled outwardly in line with theirlength, the blade moving to one reach as said reach is pulled outwardlyand to the other reach when it is pulled outwardly.

One object of the invention is to provide an efficient stropping machinepossessing novel means for rocking the blade-holder from one side to theother as alternate reaches ot the strop are pulled, and cooperativemechanism for causing said holder to travel in line with its lengthwhile the blade is against the alternately outwardly moving reaches ofthe strop, thereby enabling the blade to receive substantially the sainetreatment as it would it stropped by hand.

The present invention resides more particularly in the novelconstruction, relation and arrangement of parts constituting the severalframes ot the machine, it having been found to be highly desirable thatma` chines of this class be durable and inexpensively constructed andalso of such character y as to remain eiiicient for a very considerableperiod. The framing of the present machine A consists o1 three mainsheet metal parts, each being 1n one integral piece and e'ieientlyeooperating with one another and with the.

other features of the machine to provide a machine of great eiiiciencyand durability.

Referring to the drawings: Fig. 1 is a central vertical section througha razor blade stropping machine embodying my invention, the sectionbeing on the dotted line 1-1 of Fig. 3;

Fig. 2 is a transverse section through the n same, on the dotted line2-2 of llig. 1;

Fig. 3 is a` vertical transverse section through the same, on the dottedline 3-3 of Fig. 1;

Fig. l is a vertical section through the same, partly broken away,corresponding with Fig. 2, but illustrating the parts of the mechanismin a different position;

Fig. 5 is a perspective view of a rockable trame over which the strop isalternately pulled at its respective ends, the dottedA lines ,indicatingthe blank trom which said trame is formed;

Fig. 6 is an elevation of a blank :trom which the blade-holding frameand connectl` ed parts are formed;

Fig. 7 is a sectional view, partly broken away, lengthwise through theblade-holder, and

Fig. 8 is a section, on a larger' scale, through the same, taken on thedotted line 8 8 of Fig. 7.

ln the drawings, 10 designates the general exterior frame ot' themachine, 11 the strop, 22 an interior three-sided oscillatory framejournaled between the sides 13 or the main general frame, 12 a rockablefriction frame over which the strop 11 is folded and which is journaledbetween thevertical sides ot the trame 22, 14 a worm or screw-threadedsha'tt `journaled between the sides 13 oit the main traine on a rod 136whose ends are riveted in said sides 13 and upon which rod the ends oitthe trame 12 are pivotally mounted, and 15 a sheet metal trame fashionedat its middle portion to engage said worm or splrally grooved shaft andalso to aord a bladeholder 16 adapted to receive the razor-blade 17 tobe sharpened.

Tae exterior frame lOconiprises in one integral piece the parallel sides13 and a connecting crown portion having a liat top 18 and downwardlydiverging sides 19, said crown portion being adapted to receive withinit and between said sides 19 a spring 2O whose ends are extendeddownwardly to engage the top 21 of the interior trame 22 composed otsaid top 21 and side members 23. V'het the central upper portion of thetop 13 ot vthe general `frame is integrally formed a loop 2a to receivea strapr by which the stropping machine may be connected with a hook orother restraining device. The sides 13 ot the fra-me 10 are open lattheir lower end portions, as at 26, and

said sides are connected together at said open portion 26 by means otupper rods 27, lower rods 23 and guide-rods 29. rThe trame 10 is in oneintegral piece formed from sheet metal.

lThe interior 'trame 22 comprising the .top 21 and sides 23 is also inone integral piece of sheet metal and is ioclrably or pivotallysupported between the upper portions of the sides 13 of the main trameon a transverse rod 30 which extends through the upper portions of saidsides 23 and through the sides 13 of the main frame and is headed `atits opposite ends, as shown in Fig. 1. The sides 23 of the lrame 22 are,below the pvot rod 30, formed with arcuate slots 31, and directly belowsaid slots said. ends 23 have central downward'ly extending lower endportions 32 between which is mounted a rod 33, this rod 33 'being apivot and guide rod iter the traine which affords the blade holder 16.The sides 23 are provided bet-Ween the slots 31 and rod 30` withvertical slots 34.

The Ylranie 22 is adapted to have a limited oscillalorv movement on thepivot rod 30 and receives its movement from the rockable frame 12 Whoseside portions are equipped with pins 35 projecting into the aforesaidvertical slots The frame 22 by reason of the action of the spring 20against the top ora the same and acting at the sides of the slots 34against the pins 35, serves the function of providing a spring resistingpressure or' the razor-blade 17 against the reaches of the strop 11 andto normally maintain the bl ade-holder 16 in its central position, shownin Figs, 2 and 3, between the reaches of said strop.

The arcuate slots 31 in the sides of the frame 22 receive through themthe end portions of the rod or shaft 136 supporting the rotatoryWorm-shaft 14, said ends of said shaft or rod 136 being suitably headedin the sides 13 of the frame 10 and said arcuate slots 31 'permittingthe Jframe 22 to have an oscillatory movement on the pivot-rod 30.

The vrockable friction frame 12 is formed :from o ne integral piece ofsheet metal, as shown more particularly in Fig. and comprises verticalside portions 36 having the pins 34 and arcuate or curved front and rearbar-portions 37, between which said frame 12 is formed with an opening38. The sides of the frame 12 are also formed With bearing openings 39through which the reduced ends 1.36 of the spiral shaft or worm 14extend, and these openings "39 are in. line with the arc-aa te 'slots'31 formed inthe sides o'ilf the trame 22. The strop 11 is folded rn/"erthe "woriinshaft 14 and against the outivardly oppositely curved arcuatebar'portions 37 or' the frame 12, as shown' in Fig. 4, and 'when onereach oit the strop 11 is pulled it vill rock the frame l2 in onedirection and when the other reach of the 'strop is pulled it will rocksaid trame in the opposite direction. When the frame 12 is caused torock in one directionit Will, through the pins 35, operate to rock theframe 22 in a reverse direction. as indicated by Fig. 4, said frame 22then `acting `to compress the ends of the spring 2O and thereby create atension tending to reverse this movement of the frame 12 and compel saidlrame When the pull on the strop has ceased to carry the blade-holder 16to a central position between the reaches of thel strop.

The frame 15 is formed from a blank, shown in Fig. 6, which is foldedaround the worm-shaft 14 and at its then lower ends fashioned to providethe blade-holder 16 Whose opposite sides converge do Wnivardly, usual,and enclose between them a spring 4() (F ig. 7 which serves to pressagainst the upper edge or back of the razorblade and force the cuttingedge or said blade dmvnwardly so that the same may be exposed and engagethe strop. Those portions of the blank 1.5 which provide theblade-holder 16 are numbered 41, and said portions 41 at their facingend parts have flanges 42 which extend substantiallyv at right angles tothe portions 41 and in the finished blade-holder lap upon one| anotherand are secured together by rivets 43, as shown in Fig. 7. At themouth-end of the blade-holder the flanges 42 are slit and presseddownwardly to form a loop 44 which engages one end of the spring 40 andserves to retain the spring in position. Above the bladeholder 16 theframe 15 is bent into cylindrical form, as at 45, to closely receive therod 33, and above the'rod 33 the metal portion of the frame 15 has bars46 closely and spirally Wound upon the Worm-shaft 14, the loops formedby the bars 46 being Within the groove formed by the spiral thread olsaid shaft and free to travel on said shaft during the employment of thedevice. The frame 15 is in one integral piece of sheet metal and issuspended from the Worm-shaft 14 and rod 33, and that portion of theframe alliording the blade-holder 16 is in line with the openings 26 inthe sides 13 ofthe frame 10. At its inner end the blade-holder 16 is:formed with a stop 47 to arrest the blade When the same is insertedinto the holder. I so proportion the parts of the frame 15 that thelower edge of the blade-holder 16 is in near relation to .the rods 27When the device is in use and that 'the cutting edge of the blade Willbe engaged by the strop 11 slightly below the rods 27, as'indicate'd inFig. '4, this arra,nge ment permitting 'the strop Vto have an elfectiveaction on said cutting edge. The re lation of the blad`e-holder 16 `withregard to the rods 27 permits the lower edge of said holder to receive a:firm Vbacking from vsaid rods 27, while `the strop below said rods isenabled to engage the ci'itting edge of the blade.

In the use of the device the razor blade will be inserted in the holder16 and 'the strop 11 will lbe pulled alternately at its opposite endportions, in a knoWnman-ner. The traveling action of the strop upon the'Worm-shaft 14 effects the 'rotation ot said 1 einen shaft and theconsequent longitudinal travel of the trame 15, bladeholder 16 and blade17, said blade-holder' moving in one longitudinal direction when onereach of the strop is pulled and in the other longitudinal directionwhen the other reach of the strop is pulled, with the result that duringthe stropping the blade is given an endwise movement.

An important feature of my construct-ion of stropper resides in the tactthat the worm shaft 1&1 has a long bearing on the rod 136 and istherefore assured of uniform movement for a long period of time, B vheading the rod 13G in the sides of the main frame said ltrame becomesstrengthened, and b v reason of said rod being stationary, the walls olfthe arcuate slots 31 have a fixed relation thereto, which was not thecase heretofore when integral ends ol? the worm shaft were mounted insmall bearings in the main frame and became rapidly worn and irregularin movement.

What l claim as my invention and desire to secure by Letters Patent, is:

In a razor stropper of the character described, the combination of astrop to be pulled at alternate ends, a main frame, a spira-ily threadedshaft mounted therein, al blade-holder frame comprising fac-ing andmatching portions secured together' and forming arms at the upperportion o the holder in engagement with the thread of said shaft andbelow the same laterally curved matching portions i'orming a tubularsleeve and below said sleeve a pair of jaws adapted to releasably hold arazor blade, a pivotally hung friction frame engaged by the reaches ofsaid strop below the top of said shaft, a rocliable frame pivot-allymounted between the sides of said main frame and having sides and a rodconnecting the same and lying within said sleeve and affording a guidefor said blade holder frame, during its endwise movements, and meansconnecting said friction frame and said rockable frame so that motionmay be impart-ed from said friction frame to said roclrable frame andits said rod when the reaches of the strop are alternatively pulled,said rod being parallel with said spirally threaded shaft.

Signed at New York city, in the county of New York and State of NewYork, this 13th day of August, A. D. 1919.

SAMUEL Kunnen.

llVitnesses ARTHUR MARION, Crus. C. GILL.

